DSP 需求方平台

// 简化的竞价决策算法
function calculateBid(request, userProfile, campaign) {
    // 1. 基础定向检查
    if (!isTargetMatch(userProfile, campaign.targeting)) {
        return null; // 不参与竞价
    }
    
    // 2. 预估CTR (点击率)
    const predictedCTR = mlModel.predictCTR(
        userProfile, 
        campaign.creative, 
        request.context
    );
    
    // 3. 预估CVR (转化率)
    const predictedCVR = mlModel.predictCVR(
        userProfile,
        campaign.landingPage
    );
    
    // 4. 计算期望价值
    const expectedValue = predictedCTR * predictedCVR * campaign.cpa;
    
    // 5. 考虑预算约束
    const budgetFactor = getBudgetFactor(campaign.dailyBudget);
    
    // 6. 最终出价
    const bid = expectedValue * budgetFactor * PROFIT_MARGIN;
    
    return Math.min(bid, campaign.maxBid);
}

// OpenRTB 2.5 竞价请求处理
@PostMapping("/bid")
public BidResponse handleBidRequest(@RequestBody BidRequest request) {
    
    // 1. 请求验证
    if (!isValidRequest(request)) {
        return null; // 返回204 No Content
    }
    
    // 2. 用户匹配
    UserProfile user = userService.getProfile(request.user.id);
    
    // 3. 竞价决策
    List<BidResponse.SeatBid> seatBids = new ArrayList<>();
    
    for (Imp imp : request.imp) {
        Campaign campaign = findMatchingCampaign(user, imp);
        if (campaign != null) {
            double bidPrice = biddingEngine.calculateBid(user, imp, campaign);
            if (bidPrice > 0) {
                Bid bid = new Bid()
                    .id(UUID.randomUUID().toString())
                    .impid(imp.id)
                    .price(bidPrice)
                    .adm(campaign.creative.html);
                
                seatBids.add(new SeatBid().bid(Arrays.asList(bid)));
            }
        }
    }
    
    return new BidResponse()
        .id(request.id)
        .seatbid(seatBids)
        .cur("USD");
}